To add folders for synchronization, right click on any local (or pCloud Drive) folder and choose Sync to pCloud (or Offline access (sync) respectively). Pick location where you want to synchronize your folder and you are done! Note that by syncing pCloud Drive folders you actually make them available even in offline mode!
Another way to create a sync is to open the Sync tab of your pCloud Drive application and locate the Add New Sync button. Click it and you will be provided with two things to select – local folder and pCloud Drive folder. When you are done with your selection, click Save and your synchronization folder couple will be saved. At any time you can stop a sync by clicking the X button to the rightmost of it.